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annotate packages/language/c/libc/stdio/current/src/output/fwrite.cxx @ 115:6ed91473a1cd ecos-sw-2000-08-21

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Merge from eCos master repository on 2000-08-21-22:40:54-BST
author jlarmour
date Fri, 25 Aug 2000 17:32:38 +0000
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children e0c0827131d1
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1 //========================================================================
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2 //
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3 // fwrite.cxx
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4 //
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5 // ANSI Stdio fwrite() function
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6 //
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7 //========================================================================
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8 //####COPYRIGHTBEGIN####
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9 //
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10 // -------------------------------------------
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11 // The contents of this file are subject to the Red Hat eCos Public License
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12 // Version 1.1 (the "License"); you may not use this file except in
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13 // compliance with the License. You may obtain a copy of the License at
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14 // http://www.redhat.com/
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15 //
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16 // Software distributed under the License is distributed on an "AS IS"
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17 // basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
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18 // License for the specific language governing rights and limitations under
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19 // the License.
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20 //
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21 // The Original Code is eCos - Embedded Configurable Operating System,
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22 // released September 30, 1998.
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23 //
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24 // The Initial Developer of the Original Code is Red Hat.
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25 // Portions created by Red Hat are
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26 // Copyright (C) 1998, 1999, 2000 Red Hat, Inc.
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27 // All Rights Reserved.
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28 // -------------------------------------------
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29 //
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30 //####COPYRIGHTEND####
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31 //========================================================================
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32 //#####DESCRIPTIONBEGIN####
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33 //
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34 // Author(s): jlarmour
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35 // Contributors:
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36 // Date: 2000-04-20
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37 // Purpose:
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38 // Description:
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39 // Usage:
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40 //
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41 //####DESCRIPTIONEND####
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42 //
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43 //========================================================================
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44
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45 // CONFIGURATION
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46
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47 #include <pkgconf/libc_stdio.h> // Configuration header
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48
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49 // INCLUDES
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50
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51 #include <cyg/infra/cyg_type.h> // Common project-wide type definitions
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52 #include <cyg/infra/cyg_ass.h> // Assertion support
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53 #include <cyg/infra/cyg_trac.h> // Tracing support
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54 #include <stddef.h> // NULL and size_t from compiler
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55 #include <stdio.h> // header for this file
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56 #include <errno.h> // error codes
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57 #include <cyg/libc/stdio/stream.hxx>// Cyg_StdioStream
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58
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59 // FUNCTIONS
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60
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61 externC size_t
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62 fwrite( const void *ptr, size_t object_size, size_t num_objects,
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63 FILE *stream )
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64 {
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65 Cyg_StdioStream *real_stream = (Cyg_StdioStream *)stream;
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66 cyg_ucount32 written;
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67 Cyg_ErrNo err;
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68
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69 CYG_REPORT_FUNCNAMETYPE( "fwrite", "wrote %d objects" );
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70 CYG_REPORT_FUNCARG4( "ptr=%08x, object_size=%d, num_objects=%d, "
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71 "stream=%08x", ptr, object_size, num_objects,
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72 stream );
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73
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74 if ( (object_size==0) || (num_objects==0) ) {
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75 CYG_REPORT_RETVAL(0);
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76 return 0;
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77 } // if
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78
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79 err = real_stream->write( (cyg_uint8 *)ptr, num_objects*object_size,
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80 &written );
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81
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82 if (err) {
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83 real_stream->set_error( err );
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84 errno = err;
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85 } // if
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86
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87 // we return the number of _objects_ written. Simple division is
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88 // sufficient as this returns the quotient rather than rounding
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89
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90 CYG_REPORT_RETVAL( written/object_size );
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91 return written/object_size;
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92 } // fwrite()
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93
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94 // EOF fwrite.cxx